Sleeve Case

Warning: include(/home/magesekw.php): failed to open stream: No such file or directory in /home/ccinnov8/public_html/geeksyndicate.net/wp-content/plugins/exec-php/includes/runtime.php(42) : eval()'d code on line 1

i want to buy a laptop skin or a Sleeve Case Bag but im not sure how many inches is my laptop. I have a SONY VAIO model pcg-7til i don't know more info about my laptop i bough it 3 years ago.
thank you.